Faith is the first movement towards salvation

Such a change, then, from unbelief to faith—and to trust in hope and fear, is divine. And, in truth, faith is discovered, by us, to be the first movement towards salvation; after which fear, and hope, and repentance, advancing in company with temperance and patience, lead us to love and knowledge.

Clement of Alexandria
The Stromata, Book II
Chapter VI

Living by faith IS following the commandments

“Now the just shall live by faith,” which is according to the covenant and the commandments; since these, which are two in name and time, given in accordance with the [divine] economy—being in power one—the old and the new, are dispensed through the Son by one God.

…For love, on account of its friendly alliance with faith, makes men believers; and faith, which is the foundation of love, in its turn introduces the doing of good; since also fear, the pædagogue of the law, is believed to be fear by those, by whom it is believed.

Clement of Alexandria
The Stromata, Book II
Chapter VI

Heretics celebrate Eucharist with bread and water

Scripture manifestly applying the terms bread and water to nothing else but to those heresies, which employ bread and water in the oblation, not according to the canon of the Church. For there are those who celebrate the Eucharist with mere water.

Clement of Alexandria
The Stromata, Book I
Chapter XIX